Influence of Copper on Transport and Dissipation of Lambda-Cyhalothrin and Cypermethrin in Soils  

作　　者：LIU Jun L Xiao-Meng XIE Ji-Min LI Ping-Ping HAN Jian-Gang SUN Cheng 

机构地区：[1]School of the Environment, Jiangsu University [2]State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences [3]School of Chemistry and Chemical Engineering, Jiangsu University [4]Jiangsu Provincial Key Laboratory of Modern Agricultural Equipment and Technology, Institute of Agricultural Engineering, Jiangsu University [5]State Key Lab of Pollution Control and Resource Reuse, Nanjing University

出　　处：《Pedosphere》2013年第3期395-401,共7页土壤圈（英文版）

基　　金：Supported by the China Postdoctoral Science Foundation (No. 20090461068);the Jiangsu Provincial Planned Projects for Postdoctoral Research Funds, China (No. 1001021B);the Scientific Research Foundation for Talented Scholars of Jiangsu University, China(No. 10JDG039);the Open Fund of State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences (No. Y052010043)

摘　　要：Repeated applications of bordeaux mixture （a blend of copper sulfate and calcium hydroxide） and pyrethroid insecticides （Pys） have led to elevated copper （Cu） and Pys concentrations in vineyard surface soils. To understand the potential influence of Cu on the fate of Pys in the soil environment, we selected two Pys, cypermethrin （CPM） and lambda-cyhalothrin （A-CHT）, and two typical Chinese vineyard soils, Haplic Acrisol and Luvic Phaeozem, as experimental samples. The dissipation experiment was conducted at room temperature in the dark, and the transport of both Pys through the soils was investigated using soil thin-layer chromatography. The results showed that the transport of Pys in both soils increased as the Cu2＋ concentration increased from 0 to 100 mg L-1, and Pys were more transportable in Haplic Acrisol （HA） than in Luvic Phaeozem （LP） under the same experimental conditions. For CPM, only 100 mg L-1 of Cu2＋ significantly （P 〈 0.05） increased Pys transport through both soils relative to water. Lambda-CHT was significantly （P〈0.05） transported through HA by all the Cu2＋ concentrations compared to water, and all but the 1 mg L-1 of Cu2＋ significantly （P 〈 0.05） increased the transport of A-CHT through LP relative to water. However, the dissipation rates of CPM and λ-CHT decreased with the addition of Cu to soils. Our findings suggest that the risk of groundwater contamination by Pys increases in the soils with elevated Cu concentrations.Repeated applications of bordeaux mixture (a blend of copper sulfate and calcium hydroxide) and pyrethroid insecticides (Pys) have led to elevated copper (Cu) and Pys concentrations in vineyard surface soils. To understand the potential influence of Cu on the fate of Pys in the soil environment, we selected two Pys, cypermethrin (CPM) and lambda-cyhalothrin (λ-CHT), and two typical Chinese vineyard soils, Haplic Acrisol and Luvic Phaeozem, as experimental samples. The dissipation experiment was conducted at room temperature in the dark, and the transport of both Pys through the soils was investigated using soil thin-layer chromatography. The results showed that the transport of Pys in both soils increased as the Cu^(2+) concentration increased from 0 to 100 mg L^(-1) , and Pys were more transportable in Haplic Acrisol (HA) than in Luvic Phaeozem (LP) under the same experimental conditions. For CPM, only 100 mg L^(-1) of Cu^(2+) significantly (P<0.05) increased Pys transport through both soils relative to water. Lambda-CHT was significantly (P<0.05) transported through HA by all the Cu^(2+) concentrations compared to water, and all but the 1 mg L^(-1) of Cu^(2+) significantly (P<0.05) increased the transport of λ-CHT through LP relative to water. However, the dissipation rates of CPM and λ-CHT decreased with the addition of Cu to soils. Our findings suggest that the risk of groundwater contamination by Pys increases in the soils with elevated Cu concentrations.

关 键 词：Haplic Acrisol Luvic Phaeozem potential ecological risk pyrethroid insecticides soil thin-layer chromatography 

分 类 号：X131.3[环境科学与工程—环境科学]